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Finding the Fourth Proportional to 18,750.29, 25,809.64 and 16,978.82

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Solution

The fourth proportional to 18,750.29, 25,809.64 and 16,978.82 is: 23,371.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.29 : 25,809.64 = 16,978.82 : x
  2. Step 2: Convert to fraction form
    18,750.29/25,809.64 = 16,978.82/x
  3. Step 3: Cross multiply
    18,750.29x = 25,809.64 × 16,978.82
  4. Step 4: Simplify right side
    18,750.29x = 438,217,060.33
  5. Step 5: Solve for x
    x = 438,217,060.33/18,750.29
  6. Step 6: Final answer
    x = 23,371.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.